<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        button{
            border-radius: 5px;
        }
        div{
            width: 100px;
            height: 100px;
            background-color: green;
            border-radius: 50px;
        }
        ul,li{
            list-style: none;
        }
    </style>
</head>
<body>
<!--<button>确定</button>-->
<!--<div></div>-->
<ul>
    <li>第n项</li>
    <li>第n项</li>
    <li>第n项</li>
    <li>第n项</li>
    <li>第n项</li>
</ul>


</body>
</html>